This is from May 1994, which means that it is very old indeed. It's another one of those early levels that looks like a random collection of random polygons textured randomly at random. You can run to the exit, which takes about forty seconds if you know where to go. No real gameplay - it's just an unstructured series of angular rooms one after the other, with teleport traps that send you back to the start. Seven plus nine is sixteen.